I'm glad I could help you butchx5.
When it comes to EC2 and Linux in general there are many subjects it would be great to cover in the Wowza User's Guide. But it is important to remember that the scope of the User's Guide is - and should be, quite narrow.
With that said I agree that some more essential how to's could be included in the WowzaMediaServerForEC2_UsersGuide and in the WOWZA FOR AMAZON EC2 articles.
I think serverfault.com would be a great place to ask generic Linux questions. Technical support from the Amazon Web Service support team is great, but it will cost you at least $49.00 / month.
Various posts and commands you might find useful at some point
Set time zone at start-up (so the time in the Wowza logs is not completely off)
Substitute Europe/Copenhagen with your own zone.
Output logs realtime (the name of the logs has changed in Wowza ver. 4)
Run wowza service on startup (the name of the service has changed in Wowza ver. 4)
tail -f /usr/local/WowzaMediaServer/logs/wowzamediaserver_access.log
tail -f /usr/local/WowzaMediaServer/logs/wowzamediaserver_error.log
Wowza service commands (the name of the service has changed in Wowza ver. 4)
chkconfig WowzaMediaServer on
Check disk usage
service WowzaMediaServer status
service WowzaMediaServer stop
service WowzaMediaServer start
service WowzaMediaServer restart
How to reboot Linux (not the same as restarting instance)